Table 2. Baseline characteristics of participants of the PSMAR breast cancer screening program in the BHA affected by the COVID-19 pandemic in the area of reference of Parc de Salut Mar (PSMAR), in Barcelona, Spain in the period 2012–2021 by screening round.
| Pre-COVID 4 round | Pre-COVID 3 round | Pre-COVID 2 round | Pre-COVID 1 round | Pre-COVID total | Post-COVID +1 round | Difference post–pre | Dif | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (2012–2013) | (2014–2015) | (2016–2017) | (2018–2019) | (2012–2019) | (2020–2021) | ||||||||||
| n | % | n | % | n | % | n | % | n | % | n | % | ||||
| Age group | 50–54 | 4550 | 29.22 | 4596 | 29.50 | 4546 | 29.39 | 4434 | 28.56 | 18,126 | 29.17 | 4073 | 27.53 | −1.64% | ^ |
| 55–59 | 3912 | 25.12 | 3901 | 25.04 | 3985 | 25.77 | 4089 | 26.34 | 15,887 | 25.57 | 4038 | 27.29 | 1.73% | ^ | |
| 60–64 | 3784 | 24.30 | 3729 | 23.94 | 3710 | 23.99 | 3780 | 24.35 | 15,003 | 24.14 | 3664 | 24.77 | 0.62% | ||
| 65–70 | 3325 | 21.35 | 3352 | 21.52 | 3225 | 20.85 | 3220 | 20.74 | 13,122 | 21.12 | 3020 | 20.41 | −0.71% | ||
| Socioeconomic index level | Low | 3282 | 21.08 | 3223 | 20.69 | 3201 | 20.70 | 3226 | 20.78 | 12,932 | 20.81 | 3065 | 20.72 | −0.10% | |
| Middle-low | 1603 | 10.29 | 1612 | 10.35 | 1620 | 10.47 | 1630 | 10.50 | 6465 | 10.40 | 1586 | 10.72 | 0.31% | ||
| Middle-high | 8363 | 53.71 | 8537 | 54.80 | 8508 | 55.01 | 8626 | 55.57 | 34,034 | 54.77 | 8164 | 55.18 | 0.41% | ||
| High | 2323 | 14.92 | 2206 | 14.16 | 2137 | 13.82 | 2041 | 13.15 | 8707 | 14.01 | 1981 | 13.39 | −0.62% | ^ | |
| Type of screening | |||||||||||||||
| Prevalent | First invitation | 2058 | 13.22 | 1957 | 12.56 | 1876 | 12.13 | 1850 | 11.92 | 7741 | 12.46 | 2133 | 14.42 | 1.96% | ^ |
| Previous nonparticipant | 812 | 5.21 | 771 | 4.95 | 750 | 4.85 | 763 | 4.92 | 3096 | 4.98 | 802 | 5.42 | 0.44% | ^ | |
| Total | 2870 | 18.43 | 2728 | 17.51 | 2626 | 16.98 | 2613 | 16.83 | 10,837 | 17.44 | 2935 | 19.84 | 2.40% | ||
| Incident | Regular participant | 12,003 | 77.09 | 12,116 | 77.78 | 12,095 | 78.20 | 12,098 | 77.94 | 48,312 | 77.75 | 11,166 | 75.47 | −2.28% | ^ |
| Irregular participant | 698 | 4.48 | 734 | 4.71 | 745 | 4.82 | 812 | 5.23 | 2989 | 4.81 | 695 | 4.70 | −0.11% | ||
| Total | 12,701 | 81.57 | 12,850 | 82.49 | 12,840 | 83.02 | 12,910 | 83.17 | 51,301 | 82.56 | 11,861 | 80.17 | −2.39% | ||
| Menopause | Yes | 12,069 | 77.52 | 12,358 | 79.34 | 12,212 | 78.98 | 12,267 | 79.03 | 48,906 | 78.71 | 11,683 | 78.97 | −0.18% | |
| No | 1986 | 12.76 | 1973 | 12.67 | 2095 | 13.54 | 2106 | 13.56 | 8160 | 13.13 | 1978 | 13.37 | 0.18% | ||
| Unknown | 1516 | 9.74 | 1247 | 8.00 | 1159 | 7.49 | 1150 | 7.41 | 5072 | 8.16 | 1134 | 7.66 | |||
| Breast cancer family history | Yes | 2755 | 17.69 | 2915 | 18.71 | 3039 | 19.65 | 3213 | 20.70 | 11,922 | 19.19 | 3207 | 21.67 | 2.53% | ^ |
| No | 12,792 | 82.15 | 12,633 | 81.10 | 12,390 | 80.11 | 12,265 | 79.01 | 50,080 | 80.59 | 11,532 | 77.94 | −2.53% | ^ | |
| Unknown | 24 | 0.15 | 30 | 0.19 | 37 | 0.24 | 45 | 0.29 | 136 | 0.22 | 56 | 0.38 | |||
| Education level | Primary or lower | 4641 | 29.81 | 4024 | 25.83 | 3370 | 21.79 | 2776 | 17.88 | 14,811 | 23.84 | 2032 | 13.73 | −11.78% | ^ |
| Middle level | 6156 | 39.54 | 6367 | 40.87 | 6575 | 42.51 | 7371 | 47.48 | 26,469 | 42.60 | 7941 | 53.67 | 14.31% | ^ | |
| University | 2405 | 15.45 | 2658 | 17.06 | 2930 | 18.94 | 2777 | 17.89 | 10,770 | 17.33 | 2213 | 14.96 | −2.53% | ^ | |
| Unknown | 2369 | 15.21 | 2529 | 16.23 | 2591 | 16.75 | 2599 | 16.74 | 10,088 | 16.23 | 2609 | 17.63 | |||
| Total | 15,571 | 100.00 | 15,578 | 100.00 | 15,466 | 100.00 | 15,523 | 100.00 | 62,138 | 100.00 | 14,795 | 100.00 | |||
Dif = '^' indicates a statistically significant difference of p<0.05 between columns of the respective category.